CN109580257A - A kind of rear axle rack vibration noise measuring system - Google Patents
A kind of rear axle rack vibration noise measuring system Download PDFInfo
- Publication number
- CN109580257A CN109580257A CN201910070155.5A CN201910070155A CN109580257A CN 109580257 A CN109580257 A CN 109580257A CN 201910070155 A CN201910070155 A CN 201910070155A CN 109580257 A CN109580257 A CN 109580257A
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- China
- Prior art keywords
- wall
- rear axle
- punching axis
- axis
- bridge
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M17/00—Testing of vehicles
- G01M17/007—Wheeled or endless-tracked vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
The present invention provides a kind of rear axle rack vibration noise measuring systems, including silent room, wall-punching axis, power output device, acoustic hood, test equipment, microphone；Tested rear axle rack is arranged in silent room；The wall-punching axis includes right bridge wall-punching axis, left bridge wall-punching axis, power input wall-punching axis, the right bridge of rear axle rack connects right bridge wall-punching axis by right bridge shaft coupling, the silent room is equipped with axis hole corresponding with the right bridge wall-punching axis, and the other end of right bridge wall-punching axis installs right bridge loading device；The power output device is used to provide power to power input wall-punching axis；The acoustic hood is set on the outside of speed changer；The microphone connecting test equipment, for acquiring the noise signal in silent room.Rear axle rack vibration noise measuring system of the present invention is targetedly provided with acoustic hood for shielding the noise of speed changer, and acoustic hood can be slided accordingly according to the mobile of speed changer, strong applicability.
Description
Technical field
The invention belongs to automotive test equipment technical fields, measure system more particularly, to a kind of rear axle rack vibration noise
System.
Background technique
Vehicle bridge plays transmitting power, load bearing effect in vehicle travel process.Main reducing gear and differential in vehicle bridge
Device during the work time, can generate vibration and noise due to Gear Processing, assembly, abrasion etc., make an uproar to acceleration outside vehicle vehicle
Sound and internal car noise contribution are larger, and the accurate test of rear axle vibration noise is the important side for analyzing noise and generating root and contribution
Method.In existing test equipment, since speed changer is too close apart from rear axle, and under normal circumstances, the noise of speed changer is greater than
Rear-axle whine, the in this way interference due to speed changer background noise bring very big difficulty to the radiated noise of precise measurement rear axle.
Summary of the invention
In view of this, the present invention is directed to propose a kind of rear axle rack vibration noise measuring system, to solve to lack at present pair
The radiated noise of rear axle carries out the device of precise measurement.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of rear axle rack vibration noise measuring system, including silent room, wall-punching axis, power output device, acoustic hood, survey
Try equipment, microphone；
Tested rear axle rack is arranged in silent room；
The wall-punching axis includes right bridge wall-punching axis, left bridge wall-punching axis, power input wall-punching axis, and the right bridge of rear axle rack passes through
Right bridge shaft coupling connects right bridge wall-punching axis, and the silent room is equipped with axis hole corresponding with the right bridge wall-punching axis, and right bridge is through walls
The other end of axis installs right bridge loading device；The left bridge of rear axle rack connects left bridge wall-punching axis, silent room by left bridge shaft coupling
On also be provided with axis hole with the left bridge wall-punching axis, the other end of left bridge wall-punching axis installs left bridge loading device；
The left bridge loading device and right bridge loading device are all disposed within the outside of silent room, for mentioning to rear axle or so bridge
For load；
The power input wall-punching axis connects the input shaft of speed changer by input terminal shaft coupling, and power inputs wall-punching axis
The other end installs power output device, and the silent room is equipped with axis hole corresponding with power input wall-punching axis, and power is defeated
Device is arranged outside silent room out, and the power output device inputs wall-punching axis by power and provides power to speed changer；
The acoustic hood is set on the outside of speed changer；
The microphone connecting test equipment, for acquiring the noise signal in silent room.
It further, further include vibrating sensor, the vibrating sensor is mounted on rear axle, for acquiring the vibration of rear axle
Dynamic signal, the vibrating sensor connecting test equipment.
Further, the left bridge shaft coupling and right bridge shaft coupling are all yielding coupling, for reducing left bridge load dress
Set the vibration and impact with right bridge loading device.
Further, four walls inside the silent room and top are designed with suction puigging, for shielding power output dress
It sets, the noise of left bridge loading device, right bridge loading device.
Further, the input terminal shaft coupling is positive coupling, and the side of input terminal shaft coupling is mounted on speed changer
On the inside of mounting plate, the input shaft spline of the other side and speed changer is connected, the other side connection power input of the mounting plate of speed changer
Wall-punching axis.
Further, the power output device is variable-frequency motor or the motor equipped with frequency converter.
Further, the acoustic hood includes cabinet and the supporting leg that is mounted below cabinet, and the cabinet is steel plate weldering
Binding component, the speed changer are mounted in cabinet, the antetheca and back wall aperture of cabinet, and the front-end and back-end of speed changer are by opening
Hole is pierced by；The supporting leg is used to support cabinet.
Further, the outside of the cabinet, which is equipped with, inhales puigging, the noise inhaled puigging and be used to shield speed changer.
Further, the bottom of the supporting leg is equipped with sliding panel, and the sliding panel is steel plate, sets below the sliding panel
There is sliding rail；
Each sliding panel is equipped with two strip grooves being parallel to each other, the top of the sliding rail be equipped with it is described
The corresponding gag lever post of strip groove, the gag lever post are used for the glide direction of limit slippage plate.
Further, the gag lever post include lower section limiting section and top threaded portion, the diameter of the limiting section with
The strip groove it is of same size, the limiting section is arranged in strip groove, and the height of the limiting section is slightly larger than sliding panel
Thickness；
The diameter of the threaded portion is less than the diameter of limiting section, and the threaded portion is correspondingly provided with U-shaped board, in the U-shaped board
Equipped with bolt hole corresponding with the threaded portion, the small diameter with limiting section of the diameter of the bolt hole, the U-shaped board passes through
Fastening bolt is fixed at the top of limiting section.
Compared with the existing technology, rear axle rack vibration noise measuring system of the present invention has the advantage that
Rear axle rack vibration noise measuring system of the present invention is targetedly provided with acoustic hood for shielding speed change
The noise of device, and acoustic hood can be slided accordingly according to the mobile of speed changer, and strong applicability can be to different arrangements
The speed changer of position can be applicable in, while consider the convenience of mounting and adjusting, easy to operate, compact-sized.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is rear axle rack vibration noise measuring system easy structure figure described in the embodiment of the present invention；
Fig. 2 is acoustic hood overall structure figure described in the embodiment of the present invention；
Fig. 3 is acoustic hood side view described in the embodiment of the present invention；
Fig. 4 is supporting leg bottom local structural graph described in the embodiment of the present invention.
Description of symbols:
1, silent room；2, left bridge shaft coupling；3, left bridge loading device；4, left bridge wall-punching axis；5, rear axle；6, acoustic hood；61,
Cabinet；62, supporting leg；63, sliding panel；631, strip groove；64, sliding rail；65, gag lever post；66, U-shaped board；67, fastening bolt；
7, speed changer；8, speed changer mounting plate；9, power output device；10, power inputs wall-punching axis；11, input terminal shaft coupling；12,
Stationary fixture；13, right bridge shaft coupling；14, right bridge wall-punching axis；15, right bridge loading device；16, test equipment；17, microphone；
18, vibrating sensor.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1, a kind of rear axle rack vibration noise measuring system, including silent room 1, wall-punching axis, power output dress
Set 9, acoustic hood 6, test equipment 16, microphone 17；
Tested 5 rack of rear axle is arranged in silent room 1；The wall-punching axis include right bridge wall-punching axis 14, left bridge wall-punching axis 4,
Power inputs wall-punching axis 10, and the right bridge of 5 rack of rear axle connects right bridge wall-punching axis 14, the silent room 1 by right bridge shaft coupling 13
It is equipped with axis hole corresponding with the right bridge wall-punching axis 14, the other end of right bridge wall-punching axis 14 installs right bridge loading device 15；Afterwards
The left bridge of 5 rack of bridge connects left bridge wall-punching axis 4 by left bridge shaft coupling 2, also is provided in silent room 1 and the left bridge wall-punching axis 4
Axis hole, the other end of left bridge wall-punching axis 4 installs left bridge loading device 3；
Left bridge loading device 3 and right bridge loading device 15 are used to provide load to 5 left and right wheels of rear axle.
The left and right bridge of rear axle 5 is all correspondingly provided with stationary fixture 12, can use the axle housing that cambered surface peace faces different model
It is installed and fixed.
The left bridge loading device 3 and right bridge loading device 15 are all disposed within the outside of silent room 1, for left to rear axle 5
Right bridge provides load；
The power input wall-punching axis 10 connects the input shaft of speed changer 7 by input terminal shaft coupling 11, and power input is worn
The other end of wall axis 10 installs power output device 9, and the silent room 1 is equipped with corresponding with power input wall-punching axis 10
Axis hole, power output device 9 are arranged outside silent room 1, and the power output device 9 inputs wall-punching axis 10 to change by power
Fast device 7 provides power；
The acoustic hood 6 is set in 7 outside of speed changer；
The 17 connecting test equipment 16 of microphone, for acquiring the noise signal in silent room 1.
It further include vibrating sensor 18, the vibrating sensor 18 is mounted on rear axle 5, for acquiring the vibration of rear axle 5
Signal, the 18 connecting test equipment 16 of vibrating sensor.Test equipment 16 uses the SCL220 equipment of LMS；Vibrating sensor
18 use the 356A33 of PCB；Microphone 17 uses the 46AE of GRAS.
The left bridge shaft coupling 2 and right bridge shaft coupling 13 are all yielding coupling, for reducing left bridge loading device 3 and the right side
The vibration and impact of bridge loading device 15.The intermediate connections of yielding coupling use the material with shock-absorbing function, have one
The effect of fixed damping and protecting against shock.
Four walls and top inside the silent room 1 are designed with suction puigging, for shielding power output device 9, Zuo Qiao
The noise of loading device 3, right bridge loading device 15.
The input terminal shaft coupling 11 is positive coupling, and the side of input terminal shaft coupling 11 is mounted on speed changer mounting plate
8 insides, the other side are connect with the input shaft spline of speed changer 7, and the other side connection power input of the mounting plate of speed changer 7 is through walls
Axis 10.
The power output device 9 is variable-frequency motor or the motor equipped with frequency converter.
Such as Fig. 2, shown in Fig. 3, the acoustic hood 6 includes cabinet 61 and the supporting leg 62 being mounted below cabinet 61, described
Cabinet 61 is welded-steel plate construction part, and the speed changer 7 is mounted in cabinet 61, the antetheca and back wall aperture of cabinet 61, speed change
The front-end and back-end of device 7 are pierced by by aperture；The supporting leg 62 is used to support cabinet 61.The outside of the cabinet 61 be equipped with inhale every
Sound-absorbing layer, the noise inhaled puigging and be used to shield speed changer 7.The position of acoustic hood 6 be it is transportable, when speed changer 7
When setting variation, the acoustic hood 6 of speed changer 7 can carry out change in location according to sliding panel 63 and sliding rail 64.
Such as Fig. 3, shown in Fig. 4, the bottom of the supporting leg 62 is equipped with sliding panel 63, and the sliding panel 63 is steel plate, the cunning
The lower section of movable plate 63 is equipped with sliding rail 64；
Each sliding panel 63 is equipped with two strip grooves 631 being parallel to each other, and the top of the sliding rail 64 is set
There is gag lever post 65 corresponding with the strip groove 631, the gag lever post 65 is used for the glide direction of limit slippage plate 63.
The threaded portion of limiting section and top of the gag lever post 65 including lower section, the diameter of the limiting section and the bar shaped
Slot 631 it is of same size, the limiting section is arranged in strip groove 631, and the height of the limiting section is slightly larger than sliding panel 63
Thickness；
The diameter of the threaded portion is less than the diameter of limiting section, and the threaded portion is correspondingly provided with U-shaped board 66, the U-shaped board
66 are equipped with bolt hole corresponding with the threaded portion, the small diameter with limiting section of the diameter of the bolt hole, the U-shaped board
66 are fixed at the top of limiting section by fastening bolt 67, and U-shaped board 66 plays the position-limiting action up and down to sliding panel 63, makes sliding panel
63 are horizontally moved.The structure design of gag lever post 65 not only acts as the position-limiting action to sliding panel 63, is also used to fasten U-shaped board
66, when preventing sliding panel 63 from sliding, U-shaped board 66, which vibrates up and down, generates noise effect measurement result.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of rear axle rack vibration noise measuring system, it is characterised in that: including silent room (1), wall-punching axis, power output dress
Set (9), acoustic hood (6), test equipment (16), microphone (17)；
Tested rear axle (5) rack setting is in silent room (1)；
The wall-punching axis includes right bridge wall-punching axis (14), left bridge wall-punching axis (4), power input wall-punching axis (10), rear axle (5) rack
Right bridge right bridge wall-punching axis (14) is connected by right bridge shaft coupling (13), the silent room (1) is equipped with through walls with the right bridge
The other end of the corresponding axis hole of axis (14), right bridge wall-punching axis (14) installs right bridge loading device (15)；The left bridge of rear axle (5) rack
Left bridge wall-punching axis (4) is connected by left bridge shaft coupling (2), the axis with the left bridge wall-punching axis (4) also is provided in silent room (1)
The other end in hole, left bridge wall-punching axis (4) installs left bridge loading device (3)；
Left bridge loading device (3) the He Youqiao loading device (15) is all disposed within the outside of silent room (1), for rear axle
(5) left and right bridge provides load；
Input shaft of power input wall-punching axis (10) by input terminal shaft coupling (11) connection speed changer (7), power input
The other end of wall-punching axis (10) installs power output device (9), and the silent room (1), which is equipped with, inputs wall-punching axis with the power
(10) corresponding axis hole, power output device (9) setting is external in silent room (1), and the power output device (9) passes through power
It inputs wall-punching axis (10) and provides power to speed changer (7)；
The acoustic hood (6) is set on the outside of speed changer (7)；
Microphone (17) the connecting test equipment (16), for acquiring the noise signal in silent room (1).
2. rear axle rack vibration noise measuring system according to claim 1, it is characterised in that: further include vibrating sensor
(18), the vibrating sensor (18) is mounted on rear axle (5), for acquiring the vibration signal of rear axle (5), the vibrating sensing
Device (18) connecting test equipment (16).
3. rear axle rack vibration noise measuring system according to claim 1, it is characterised in that: the left bridge shaft coupling
(2) He Youqiao shaft coupling (13) is all yielding coupling, for reducing left bridge loading device (3) He Youqiao loading device (15)
Vibration and impact.
4. rear axle rack vibration noise measuring system according to claim 1, it is characterised in that: in the silent room (1)
Four walls in portion and top are designed with suction puigging, for shielding power output device (9), left bridge loading device (3), the load of right bridge
The noise of device (15).
5. rear axle rack vibration noise measuring system according to claim 1, it is characterised in that: the input terminal shaft coupling
It (11) is positive coupling, the side of input terminal shaft coupling (11) is mounted on the inside of speed changer mounting plate (8), the other side and speed change
The input shaft spline of device (7) connects, other side connection power input wall-punching axis (10) of the mounting plate of speed changer (7).
6. rear axle (5) rack vibration noise measuring system according to claim 1, it is characterised in that: the power output
Device (9) is variable-frequency motor or the motor equipped with frequency converter.
7. rear axle rack vibration noise measuring system according to claim 1, it is characterised in that: acoustic hood (6) packet
The supporting leg (62) for including cabinet (61) and being mounted below cabinet (61), the cabinet (61) is welded-steel plate construction part, described
Speed changer (7) is mounted in cabinet (61), and the front-end and back-end of the antetheca and back wall aperture of cabinet (61), speed changer (7) pass through
Aperture is pierced by；The supporting leg (62) is used to support cabinet (61).
8. rear axle rack vibration noise measuring system according to claim 7, it is characterised in that: outside the cabinet (61)
Side, which is equipped with, inhales puigging, the noise inhaled puigging and be used to shield speed changer (7).
9. rear axle (5) rack vibration noise measuring system according to claim 7, it is characterised in that: the supporting leg (62)
Bottom be equipped with sliding panel (63), the sliding panel (63) is steel plate, and the lower section of the sliding panel (63) is equipped with sliding rail
(64)；
Each sliding panel (63) is equipped with two strip grooves (631) being parallel to each other, the top of the sliding rail (64)
Equipped with gag lever post (65) corresponding with the strip groove (631), the gag lever post (65) is used for the sliding of limit slippage plate (63)
Direction.
10. rear axle rack vibration noise measuring system according to claim 9, it is characterised in that: the gag lever post (65)
The threaded portion of limiting section and top including lower section, the diameter of the limiting section of same size, institute with the strip groove (631)
It states limiting section to be arranged in strip groove (631), the height of the limiting section is slightly larger than the thickness of sliding panel (63)；
The diameter of the threaded portion is less than the diameter of limiting section, and the threaded portion is correspondingly provided with U-shaped board (66), the U-shaped board
(66) it is equipped with bolt hole corresponding with the threaded portion, the small diameter with limiting section of the diameter of the bolt hole is described U-shaped
Plate (66) is fixed at the top of limiting section by fastening bolt (67).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910070155.5A CN109580257A (en) | 2019-01-24 | 2019-01-24 | A kind of rear axle rack vibration noise measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910070155.5A CN109580257A (en) | 2019-01-24 | 2019-01-24 | A kind of rear axle rack vibration noise measuring system |
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| Publication Number | Publication Date |
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| CN109580257A true CN109580257A (en) | 2019-04-05 |
Family
ID=65918051
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910070155.5A Pending CN109580257A (en) | 2019-01-24 | 2019-01-24 | A kind of rear axle rack vibration noise measuring system |
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| CN (1) | CN109580257A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231170A (en) * | 2019-06-04 | 2019-09-13 | 中汽研（天津）汽车工程研究院有限公司 | A kind of test method of speed changer impact noise |
| CN110426198A (en) * | 2019-08-06 | 2019-11-08 | 中汽研（天津）汽车工程研究院有限公司 | A kind of vehicle drive-train NVH test macro |
| CN111031418A (en) * | 2019-12-10 | 2020-04-17 | 哈尔滨工程大学 | Sound insulation and amplification device for wall surface of force-excited reverberation box |
| CN111322976A (en) * | 2020-03-31 | 2020-06-23 | 中国汽车技术研究中心有限公司 | Adjustable transmission gear comprehensive clearance measuring device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110231170A (en) * | 2019-06-04 | 2019-09-13 | 中汽研（天津）汽车工程研究院有限公司 | A kind of test method of speed changer impact noise |
| CN110426198A (en) * | 2019-08-06 | 2019-11-08 | 中汽研（天津）汽车工程研究院有限公司 | A kind of vehicle drive-train NVH test macro |
| CN111031418A (en) * | 2019-12-10 | 2020-04-17 | 哈尔滨工程大学 | Sound insulation and amplification device for wall surface of force-excited reverberation box |
| CN111031418B (en) * | 2019-12-10 | 2021-04-06 | 哈尔滨工程大学 | Sound insulation and amplification device for wall surface of force-excited reverberation box |
| CN111322976A (en) * | 2020-03-31 | 2020-06-23 | 中国汽车技术研究中心有限公司 | Adjustable transmission gear comprehensive clearance measuring device |
| CN111322976B (en) * | 2020-03-31 | 2024-05-07 | 中国汽车技术研究中心有限公司 | Adjustable transmission gear comprehensive clearance measuring device |
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Application publication date: 20190405 |